Cytotoxic T lymphocytes (CTLs) recognize viral antigens presented by infected cells in the context of their major histocompatibility complex glycoproteins. The irreversible killing of virus-infected cells by virus-specific CTLs can be the cause of serious disease, particularly in the central nervous, hepatic, and cardiovascular systems. Design of molecules controlling (blocking) interaction between CTLs and infected cells, and their further use to inhibit (or antagonize) T-lymphocyte activity, is an important pharmacologic goal. In this report, we describe the design of a new family of peptides which selectively inhibit activity of lymphocytic choriomeningitis virus-specific CD8+ T lymphocytes, which recognize endogenously processed viral epitopes presented by major histocompatibility complex class I molecules
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